MEASURES OF DISPERSION

MEASURES OF DISPERSION

1. RANGE

   • Difference between the largest and smallest data in a series of numbers

2. MEAN DEVIATION

   • Average of absolute values
   • Difference between each datum and the arithmetic mean

3. MEAN DEVIATION FOR GROUPED DATA

   • average of all group mean data

4. SEMI - INTERQUARTILE RANGE

   • Average between first and third quartile

5. TYPICAL DEVIATION

   • Square root of variance

6. VARIANCE

   • Average of data squares and arithmetic mean

7. COEFFICIENT OF VARIATION

   • Quotient of dividing the standard deviation of a data between its arithmetic mean

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